British reports claimed on Sunday that Prince William invited Liverpool and Egyptian star Mohamed Salah to attend Earthshot Awards Ceremony.
The prize was launched in October 2020 in order to search for inspiring and innovative solutions to problems facing the planet.
The finalists were selected by experts who were looking for projects that had a "significant positive impact" on people and the natural world.
Five winners, each receiving £1m, will be announced in a ceremony in October.
The prize was inspired by US President John F Kennedy's "Moonshot" programme, which resulted in the US Apollo lunar launches and the first man setting foot on the Moon in 1969.
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